Air permeability and bursting strength of weft-knitted fabrics from glass yarn. Part I: cam setting and number of yarn ply effect

Abstract

This study revealed the effect of cam setting and number of yarn ply on air permeability and bursting strength of weft-knitted fabrics from glass yarn. Change in cam setting from loose to tight level increased fiber content, and stitch-density; while it decreased loop length. Fabrics with 3-ply yarn exhibited higher fiber content; lower stitch-density; and longer loop length than fabrics with 2-ply yarn. Cam setting showed more pronounced effect on physical properties of fabric than number of yarn ply. Fabrics knitted via tight cam setting level exhibited less air permeability, and higher bursting strength than fabrics knitted via loose cam setting. Fabrics from 3-ply yarn showed less air permeability and higher bursting strength than fabrics from 2-ply yarn. Loop length, wale density, and fiber content were determined as the most effective physical properties on permeability and bursting strength. A negative correlation was detected between air permeability and bursting strength.

Air permeability and bursting strength of weft-knitted fabrics from glass yarn. Part II: knit architecture effect

“…Furthermore, the effect of the number of yarn ply on thickness and areal density of the fabrics was also influential. This was described in our previous study, published online on JOTI (Ince & Yildirim, 2018). Similarly, knit patterns, except for those with tuck stitches, exhibited negative correlation in pairs of 'loop length-thickness' and 'loop length-areal density'.…”

“…The knit patterns of weft-inlay, single jersey and skip stiches displayed a negative moderately strong relationship between loop length and thickness, while structures with tuck stitches displayed a positive strong relationship ( Figure 9 left, Table 7 first row block). Our previous study, published online in the JOTI (Ince & Yildirim, 2018), indicated that loose fabric cam setting (#8), and 3-ply yarn, increased loop length, as compared with tight fabric cam setting (#3) and 2-ply yarn ( Figure 10). Following examination of the relationships between 'loop lengththickness' and 'loop length -areal density', it was seen that the number of yarn ply was dominant over cam setting for structures with tuck stitches.…”

“…Part I: cam setting and number of yarn ply effect'. This was published online in the Journal of Textile Institute on 16 July 2018 (Ince & Yildirim, 2018).…”

“…The effects of cam setting and number of yarn ply on properties of weft-knitted fabrics from glass yarn (Part I of this research, Ince & Yildirim, 2018) have already been published online in JOTI. In this study (Part II of this research), the effect of stitch type (loop, skip, and tuck stitches), and weft-inlay yarn on physical properties, air permeability, and bursting strength of weft-knitted fabrics from glass yarn were revealed.…”

Structural design and mechanical properties of glass fiber weft-knitted biaxial tubular fabrics

“…It is known that the knitting structures are consist of loops of stitch yarns whose main function is to bind the insertion yarns together. The types of knitting structure 6,7 and the kinds of stitch yarn determine the properties of composites. The interlaminar properties of aramid binding and polyester binding multilayered biaxial weft knitted (MBWK) fabric reinforced epoxy composites were experimentally investigated by Qi et al 8 They found that the higher tensile strength of stitch yarn, the higher bending and interlaminar shear properties of the MBWK fabric reinforced composites.…”